ace.define('ace/ext/whitespace', ['require', 'exports', 'module', 'ace/lib/lang'], function (require, exports, module) {
  'use strict';
  var lang = require('../lib/lang');
  exports.$detectIndentation = function (lines, fallback) {
    var stats = [];
    var changes = [];
    var tabIndents = 0;
    var prevSpaces = 0;
    var max = Math.min(lines.length, 1000);
    for (var i = 0; i < max; i++) {
      var line = lines[i];
      if (!/^\s*[^*+\-\s]/.test(line)) continue;
      if (line[0] == '\t') {
        tabIndents++;
        prevSpaces = -Number.MAX_VALUE;
      } else {
        var spaces = line.match(/^ */)[0].length;
        if (spaces && line[spaces] != '\t') {
          var diff = spaces - prevSpaces;
          if (diff > 0 && !(prevSpaces % diff) && !(spaces % diff)) changes[diff] = (changes[diff] || 0) + 1;
          stats[spaces] = (stats[spaces] || 0) + 1;
        }
        prevSpaces = spaces;
      }
      while (i < max && line[line.length - 1] == '\\') line = lines[i++];
    }
    function getScore(indent) {
      var score = 0;
      for (var i = indent; i < stats.length; i += indent) score += stats[i] || 0;
      return score;
    }
    var changesTotal = changes.reduce(function (a, b) {
      return a + b;
    }, 0);
    var first = { score: 0, length: 0 };
    var spaceIndents = 0;
    for (var i = 1; i < 12; i++) {
      var score = getScore(i);
      if (i == 1) {
        spaceIndents = score;
        score = stats[1] ? 0.9 : 0.8;
        if (!stats.length) score = 0;
      } else score /= spaceIndents;
      if (changes[i]) score += changes[i] / changesTotal;
      if (score > first.score) first = { score: score, length: i };
    }
    if (first.score && first.score > 1.4) var tabLength = first.length;
    if (tabIndents > spaceIndents + 1) {
      if (tabLength == 1 || spaceIndents < tabIndents / 4 || first.score < 1.8) tabLength = undefined;
      return { ch: '\t', length: tabLength };
    }
    if (spaceIndents > tabIndents + 1) return { ch: ' ', length: tabLength };
  };
  exports.detectIndentation = function (session) {
    var lines = session.getLines(0, 1000);
    var indent = exports.$detectIndentation(lines) || {};
    if (indent.ch) session.setUseSoftTabs(indent.ch == ' ');
    if (indent.length) session.setTabSize(indent.length);
    return indent;
  };
  exports.trimTrailingSpace = function (session, options) {
    var doc = session.getDocument();
    var lines = doc.getAllLines();
    var min = options && options.trimEmpty ? -1 : 0;
    var cursors = [],
      ci = -1;
    if (options && options.keepCursorPosition) {
      if (session.selection.rangeCount) {
        session.selection.rangeList.ranges.forEach(function (x, i, ranges) {
          var next = ranges[i + 1];
          if (next && next.cursor.row == x.cursor.row) return;
          cursors.push(x.cursor);
        });
      } else {
        cursors.push(session.selection.getCursor());
      }
      ci = 0;
    }
    var cursorRow = cursors[ci] && cursors[ci].row;
    for (var i = 0, l = lines.length; i < l; i++) {
      var line = lines[i];
      var index = line.search(/\s+$/);
      if (i == cursorRow) {
        if (index < cursors[ci].column && index > min) index = cursors[ci].column;
        ci++;
        cursorRow = cursors[ci] ? cursors[ci].row : -1;
      }
      if (index > min) doc.removeInLine(i, index, line.length);
    }
  };
  exports.convertIndentation = function (session, ch, len) {
    var oldCh = session.getTabString()[0];
    var oldLen = session.getTabSize();
    if (!len) len = oldLen;
    if (!ch) ch = oldCh;
    var tab = ch == '\t' ? ch : lang.stringRepeat(ch, len);
    var doc = session.doc;
    var lines = doc.getAllLines();
    var cache = {};
    var spaceCache = {};
    for (var i = 0, l = lines.length; i < l; i++) {
      var line = lines[i];
      var match = line.match(/^\s*/)[0];
      if (match) {
        var w = session.$getStringScreenWidth(match)[0];
        var tabCount = Math.floor(w / oldLen);
        var reminder = w % oldLen;
        var toInsert = cache[tabCount] || (cache[tabCount] = lang.stringRepeat(tab, tabCount));
        toInsert += spaceCache[reminder] || (spaceCache[reminder] = lang.stringRepeat(' ', reminder));
        if (toInsert != match) {
          doc.removeInLine(i, 0, match.length);
          doc.insertInLine({ row: i, column: 0 }, toInsert);
        }
      }
    }
    session.setTabSize(len);
    session.setUseSoftTabs(ch == ' ');
  };
  exports.$parseStringArg = function (text) {
    var indent = {};
    if (/t/.test(text)) indent.ch = '\t';
    else if (/s/.test(text)) indent.ch = ' ';
    var m = text.match(/\d+/);
    if (m) indent.length = parseInt(m[0], 10);
    return indent;
  };
  exports.$parseArg = function (arg) {
    if (!arg) return {};
    if (typeof arg == 'string') return exports.$parseStringArg(arg);
    if (typeof arg.text == 'string') return exports.$parseStringArg(arg.text);
    return arg;
  };
  exports.commands = [
    {
      name: 'detectIndentation',
      description: 'Detect indentation from content',
      exec: function (editor) {
        exports.detectIndentation(editor.session);
      },
    },
    {
      name: 'trimTrailingSpace',
      description: 'Trim trailing whitespace',
      exec: function (editor, args) {
        exports.trimTrailingSpace(editor.session, args);
      },
    },
    {
      name: 'convertIndentation',
      description: 'Convert indentation to ...',
      exec: function (editor, arg) {
        var indent = exports.$parseArg(arg);
        exports.convertIndentation(editor.session, indent.ch, indent.length);
      },
    },
    {
      name: 'setIndentation',
      description: 'Set indentation',
      exec: function (editor, arg) {
        var indent = exports.$parseArg(arg);
        indent.length && editor.session.setTabSize(indent.length);
        indent.ch && editor.session.setUseSoftTabs(indent.ch == ' ');
      },
    },
  ];
});
(function () {
  ace.require(['ace/ext/whitespace'], function (m) {
    if (typeof module == 'object' && typeof exports == 'object' && module) {
      module.exports = m;
    }
  });
})();
